Blanking device for material mixing machine

The utility model relates to a blanking device for a material mixing machine. The blanking device comprises a hopper main body, a blanking port is arranged on the hopper main body, a material closing plate is arranged on the blanking port, a power device capable of driving the material closing plate to move vertically is positioned above the blanking port, a monitor device is positioned on the power device, and a control device of the power device is further arranged on the hopper main body. The blanking device has the advantages that the control can control the power device arranged above the blanking port to driven the material closing plate to move vertically, a material closing type of the material mixing machine is changed into a vertical material closing type, deformation of the material closing plate is prevented, faults of material leakage, blocking and the like are avoided, and the blanking device is good in using effect, good in operation effect and simple to maintain.